Why was Group B rally racing stopped after 1986?
From http://www.stormloader.com/groupb/history.html The end of Group B The pace of technology in Group B was astounding, but FISA was planning Group S. Group S was to be a class which would allow manufacturers to produce highly futuristic cars, and only ten copies would be required for homologation. However, the inevitable finally happened: during the 1986 Port Wine rally in Portugal, a Ford RS200 left the road on a spectator stage, killing three and injuring dozens; after the crash, all the works teams withdrew from the rally. But the final blow for Group B came on May 4, 1986. Lancia’s lead driver, Henri Toivonen, was dominating the 1986 championship and the Tour de Corse rally when his S4 left the road during a twisty tarmac stage. The car went off the edge of the road, hitting trees and rocks while sliding down a hillside. Toivonen and his navigator, Sergio Cresto, were killed. There were no witnesses to the crash, and the subsequent fire completely destroyed the car, leaving the r
